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• <br />Table 2.04.10(2). Sandsa~e density--area to be mined <br />Date of sanplir.~: "_~, h :,d '^91 <br />Obser'+er: Hvder and Y.o~ston <br />.attrib.~te: Sandsa~e densit•t, }:umber eer 1f100th acre, Data transfor-~ed <br />to ~ for analysis, Twenty sas Ales ta~.en or. yalent Sand and <br />fi`teen on Cs ;cod Said--Cates cooled <br />Sanple sire (n) ............................:................ 75 <br />~~ _ - <br />,.eon x) .................................................... 4.2Q <br />(x.29 squared = 18.r-0 per plot, 1,~~0 per acre) <br />Sues of squares (S x2) ........................ 72.74 <br />'Jariance o` sa.:.ole (sx ) .................................... 2.14 <br />St~~P__~ ~rvia=ion (G•< ..... 1.a6 <br />(1.46 souared = 2.7.7 per plot, 2'_7 per acre) <br />Standa_-d error (s x) ........................................ 0.25 <br />., .. ~ _ , <br />•~oe_,ic~ent of variation ~V) ............................... 7<,~ <br />Confidence interval at 9g;> .................................. = OO~n <br />(note: this is lo;. o: the mea::) <br />Confidence interval at 90 .:.................................. t O.t2 <br />(note: this is 10:, o` the mean) <br />Confidence interval at 80 :: .................................. t 0.77 <br />(note: this is E;: 'of the mean) <br /> <br />• _- <br />-82- <br />